DL 2279 then DL 1892 at Atlanta
Philadelphia → Atlanta → Chattanooga
Timetable, Atlanta time
16:24DL 2279 from Philadelphia at the gate
14:30DL 1892 to Chattanooga leaves the gate
22 h 06 apart on the timetable, overnight
DL 1892 leaves 22 h 06 after DL 2279 arrives on the timetable: more than half a day, so not a connection we count.